More to explore:
Secret Sauce by Bakerella For a super moist cake spray each layer with sugar water before icing it.
Homemade lemon extract
Substitute for Cream of Tartar is Lemon Juice. 1/2 tsp CoT = 1/2 tsp Lemon Juice
How she gets her cakes so moist--- sprays a simple-sugar-syrup concoction on each layer
Oatmeal lemon creme cookies
A Guide to Produce Ripening